Child labor is a common family survival strategy, especially for farmers in rural areas where it is hard to enforce rules or to reach the poor with any supporting infrastructure or social services

If the demand for a monopoly's output shifts rightward, the change in quantity produced is

A) positive. B) negative. C) zero. D) not predictable.

The IV estimator can be used to potentially eliminate bias resulting from

A) multicollinearity. B) serial correlation. C) errors in variables. D) heteroskedasticity.